#!/bin/sh
salutation="Hello"
echo $salutation
echo "The program $0 is now running" # 取第0个参数
echo "parameter 1 is $1" #取第一个参数
echo "parameter 2 is $2"
echo "parameter 3 is $3"
echo "total parameter is $#"  #取参数的总个数
echo "all parameter is $*"  #取出所有参数